Marquise|Natural|GIA

0.51ct H SI1 Marquise Natural Diamond

GD • H/SI1 • GIA 6532098990

Certificate GIA 6532098990

Diamond specifications and retailer prices

From $606 USD
As of October 22, 2026
11 retailers carry this diamond
Most expensive: $2,027 USD at NZ Jewellers · As of October 21, 2026
View at NZ Jewellers

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6532098990. Listed at 11 retailers as of October 21, 2026. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
H
Color
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6532098990
Dimensions8.30 × 4.20 × 2.55 mm
L/W Ratio1.98
Top View
8.30 mm4.20 mm0.51 ctH / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6532098990
Side View
Table 58.0%CrownGirdle: ThickPavilionCulet: NoneDepth 60.8%

Caratlytics Score

No score right now
No retailer has confirmed this stone recently, so we are not scoring it. Prices below are as of the date shown.

Price History

Last verified: Oct 22
Current: $2,027 USD|Low: $583 USD|High: $2,027 USD|Avg: $890 USD|+2.3%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
October 23, 2026
Retailer 4$583 USD
Retailer 15$606 USD
Retailer 16$640 USD
Retailer 7$655 USD
Retailer 14$689 USD
Retailer 5$696 USD
Retailer 6$746 USD
Retailer 13$747 USD
Retailer 2$765 USD
Retailer 9$778 USD
Retailer 12$786 USD
Retailer 10$817 USD
Retailer 3$830 USD
Retailer 11$936 USD
Retailer 8$972 USD
Retailer 17$986 USD
Retailer 18$1,501 USD
NZ Jewellers$2,027 USD

29 data points across 18 retailers

11 retailers$606 USD to $2,027 USD

Retailer 1
-
$606 USD
Price last confirmed 10 days ago
Retailer 2
-
$640 USD
View
Price last confirmed 10 days ago
Retailer 3
-
$655 USD
View
Price last confirmed 11 days ago
Retailer 4
-
$689 USD
View
Price last confirmed 10 days ago
Retailer 5
-
$696 USD
View
Price last confirmed 17 days ago
Retailer 6
-
$746 USD
View
Price last confirmed 12 days ago
Retailer 7
-
$747 USD
£588 GBP
View
Price last confirmed 10 days ago
Retailer 8
-
$972 USD
A$1,495 AUD
View
Price last confirmed 29 days ago
Retailer 9
-
$986 USD
ZAR 15,933 ZAR
View
Price last confirmed 11 days ago
Retailer 10
-
$1,501 USD
£1,182 GBP
View
Price last confirmed 15 days ago
Most Expensive
NZ Jewellers
9e8d43d2-6587-47a2-b333-7d178c87d47b · Oct 21
$2,027 USD
View
Price under review
10 more retailers have this diamond

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

0.51ct Marquise
$606 USD